Calcining-furnace



(No Model.) 3 Sheets-Sheet 1.

' A. H. W HEY.

GALGINING NAGB No. 559,(547. Patented May 5, 1896.

/NVENTOH A TTOHNEYS.

3 Sheets-Sheet 2.

(No Model.)

A. H. WETHEY.

CALCINING FURNAGE. No. 559,(537. Patented May 5, 1896.

/NVE OH i Qy Q Qy BY' 4 %5% v ANDREW BVGRAHM.PNUTO-UI'NQWASHNGTONJ c (No Mode1.} V. 3 Sheets-Sheet 3. A. H. WETHBY. I GALCINING PURNAGE.

Patented May 5, 1896 I /NVENTOB W/TNESSES:

'PATENT FhlChm ARTHUR HARVEY XVETIIEY, OF BUTTE, lllONTANA.

CALClNlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 559,647, dated May 5, 1896.

Application filed February Z, 1894. Serial No. 498.921. (No model.)

To all whom 't may conccrz:

Be it known that I, ARTHUR HARVEY WE- THEY, of Buttc, in the County of Silver BOW and State of Montana, have invented a new and Improved Oalcining-Furnace, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved calcining ordesulfurizing :furnace designed for rapidly and thoroughly dcsulfurizing ores and other material in a ground, crushed, pulverized, or concentrated state, and without loss or Waste of material.

The invention consists principally of roastingconpartmcnts located one above the other and connected in such a manner as to form a continuous chamber for the passage of the ore and the hoat, the latter traveling in an opposite direction to the movement ot' the ore, and a stirring device comprising an endless trav'eling chain having its several runs passin g longitudinally alongside the said compartnents, and plows or stirrers carried hy the said chain and adapted to travel through the several compartments, to stir up the material under treatment, and to move the same forward to permit it to finally drop from an upper compartment into the next lower one at or near the ends thei-cof.

The invention also consists of certain parts and details and comhinations of the same, as willhe hereinafter described and then pointed ont in the clains.

Reference s to he had to the accompanying drawings, forming a part of this specification, in. which similar letters of reference indicate corresponding parts in all the figures.

Figur-e 1 is a longitudinal section of the improvement on the line 1 l of Fig. 3. Fig. 2 is a longitudinal section of the same on the line 2 2 of Fig. Fig. 3 is an enlarged crosssection of the same on the line 3 3 of Fig. 2. Fig. i: is a detail View showing hoW doors P opcrate.

The drawings illustrate a double or pair furnace-that is, one having both sides alike; but it is evident that a desired number of furnaces can he constructed on the same plan Without deviating from the invention.

As the two fnrnaces A A shown in the drawings are alike in Construction, it suffices to dcscribe but one in detail.

Each furnace A A' is provided With a series of longitudinally-extending compartnents B B' 13 13 located one above the other, as plainly shown in Fig. 2, and separated from each other by dead-air spaces C. The lowernost conpartment B is connected at its right-hand end by a vertical channel D With the corresponding end of the next conpartment B', and the latter is connected at its left-hand end by a corrcsponding vertical chan nel D With the corresponding end of the third compartment B and the latter is connected at its righthand end by a channel D with the corresponding end of the uppermost compartment The latter is provided in its roof or top wall and at the left-hand end With a charging-opening D through which the material to be treated is introduced into the corresponding furnace A or A'. In the bottom of the lowermost compartment B, and near the left-hand end thereof, is arranged an ontlet D through which the roasted or desulfurized material is finally discharged from the furnace in the manner hereinafter more fully described, the material dropping into a car or other suitable vessel. located below the said outlet-opening D (See Fig. 2.)

In the lowermost compartment B and at the left of the outlet-opening D is arranged a heat-inlet opening J, connected With a fire-bo): F of any approved Construction, (see Fig. 3,) so that fuel burning in the said fire-box discharges its heat through the opening E into the loWermost compartment B, along which the heat passes, to finally pass by the channel D into the next compartment B', located above it, to pass along the same, and to then pass, through the channel D', into the third compartment 13 along the same, and through the channel D into the uppermost compartnent 13 from which it finally passes through an opening E' into the chimney G. (See Figs. 2 and The material under treatment passed into the uppermost compartment B through the opening D travels in an opposite direction to the movement of the gas and heat above describedthat is, it passes first along the compartment B drops through the channel IOO D into the compartnent 13 is then moved along the same to drop through the channel D' into the com partment B', tobe moved along the latter to then drop through the channel D into the compartment B, to be moved along the latter to be finally discharged through the outlet D into the car located below it. By this arrangem ent the material is first subjected to heat of comparatively low temperature and is gradually moved into a higher temperature, reaching its highest point previous to the material being discharged through the opening D as above explained. Now in order to move the material through the several compartments in the manner described the following deviee is provided: Through each of the compartmcnts are adapted to pass stirrin g devices, each having a number of shovels or plows H secured on a transversely-extend- ,ing shaft I, reaching from one furnaee to the other and extending into the corresponding compartments thereof, as will be readily understood by reference to Fig 3. Each shaft I is engaged outside of the inner walls of the f urnaee A and A' by cross-heads J, secured on endless traveling chains K, each passing over the pulleys L, L', L L and L of which the pulleys L, IP, and L are arranged a suitable distance from one end of the furnace, while the other pulleys L' and L are siniilarly arranged a suitable distance froni the other end of the furnace, as will be plainly seen by reference to Fig. 1. lt Will further be seen that the several pulleys are located one above the other in such a manner that the several runs of the endless chain K pass in alinement with the respective compartments B B' B 13 so that a 'single shaft I is carriedsuecessively from one compartment to the next one and in an opposite direction to its former movement.

In order to supportthe runs of the chain K between the corresponding oppositely-arranged sets of pulleys, I provide carrier-pulleys N, journaled in suitable bearngs supported on a skeleton frame of the furnace between the inner walls thereof. In order to support the shafts I in the proper position during their passage through the several compartnents, I provide each shaft with an eX- terior wheel O, traveling in a corrcspondinglyshaped rail O', secured to the outer face of the inner wall of the corresponding furnace A or A'. In order to sustain theinner ends of the shafts I, I provide the same with similar Wheels O traveling on rails 0 extending within the respective com partnents B, B', 13 and 13 Now it will be seen that when the chain K receives a traveling motion by rotating any one of the pulleys L, L L L or L then a traveling motion is given to the several shafts I, so that the latter pass successively through the several compartments B B' 13 13 to move the material by their shovels H in the direction above described, it being understood that the material is first moved in the uppermost compartnent 13 from the inlet-opening D to the channel D through which the material drops into the next followin g compartment 13 to be moved along the same to be finally permitted to drop through the channel D' into the compartment B', and so on, as above described.

In order to prevent air from passing into I the eompartments at the ends and the inner walls, I provide the inner walls with selfclosing doors P, which are opened bythe moving shafts I, and the ends of the said compartments are provided with similar doors Q` adapted to beopened by the shovels H and adapted to close as soon as the shovels or plows have passed into or from the respective end. The doors P are pivoted at their upper edges to the I-beans S with their lower free edges resting on the brickwork at the side or' the hearth, as clearly shown in Fig. 4. lVhen the rear ends of the doors are engaged by the shafts I, the doors will swing inwardly and upwardly till said shafts pass and then drop again into their closed positions.

It will be seen that the shovels or plows in their movement through the several Compartments stir up and agitate the material contained therein, at the same time moving it p gradually forward to permit it to drop to the next following compartment, as above described, so that the material is thoroughly subjected to the action of the heat passing through the compartments in an opposite direction to the movement of the material. order to hold the endless traveling chain K snficiently tight, I mount the pulleys L and L on longitudinally-adjustable bearings R of any approved Construction and arrangcd to take up any slack occurring in the chain.

The furnaces A and A' are preferablyeonstructed, as shown, and are provided with a netallic skeleton frame and a brickwork composed principally of the outer walls T, the

inner walls T', and the arches T as plainly illustrated in Fig. 3.

The metallic skeleton frame is provided with sets of channel-beanis placed suitable distances apart on each outer face of the outer walls T, each set of channel-beans being COlllposed of two ehannel-beans S tied together. each two oppositely-arranged sets of beans forming a support for a transversely-extending main I-beam S', which acts as a bindcr or backstay for both furnaces A A'. The beams S S' of a set are tied together by rods S one on each side of the main beam S', as plainly shown in the drawings. Short beams S are employed to connect the inside walls T' of the two furnaces with each other, and these beams S rest on longitudinal beans 8 set or built in the inner walls T'. The I-beans S' 'and S* support channel-beans 8 which in turn support the track-rails O', on which the wheels O travel, as previously described.

From the main I-beams S are Suspended secondary I-beams S By means of special castings S these beams S support one side of the arches '17 above the hearth of each compartnent B, B', B and 13 (See Fig. 3. l

in i

IOO

elongated holes, so that the beams can expand or contraet freely.

From the I-beains S the arehes or roofs T are swung over to the main outside walls T of the furnaces A and A', and the said beams also support short walls T extending transversely and reaching to the floor of the next coinpartnent above, so as to form the deadair spaces C, previously described. The airspaces C are preferably provided with ventilating-doors. On the ends of the arches T are secured transversely-extending plates S on which the end doors Q are hung, it being understood that the door at one end of a compartnent swings iiward, While the door at the other end swings outward. (See Fig. 2, full and dotted linos.)

The hearth T of each eompartnent B, B', 13 or 13 is made of a fircproof material and set on a metallie plate 8 supported on longitudinally-extending T-rails S resting on the main beans S', as will be readily understood by reference to Fg. 3. The plates S" are made in sections of sheet iron or steel and placed suitable distances apart to allow for expansion.

It will be seen that by a furnace constructed in the manner described the material is readilyealcined or desuli'urized, and all the Working parts of the furnaees can be readily reached, so that repairs of all kiiids can be quickly effected at any time. The furnaces are so construeted that they can he enlarged at wilheither by inereasing the height by the addition of more conpartments or by increasing the length of the compartncnts already built and inereasing the number of the fireboxes F and ehiinneys G, as the latter must be suflieient to remove all funes and gases and allow sufficicnt draft for the proeesses of calcining to proceed in a proper nanner. It Will also be seen that the arrangenent of the main beans permits a free expansion and contraction. Without causing any damage to the furnace, and also pernits of increasing the size of the furnaoe at any time in the manner above described. The said beams also allow the free passage of the plows H into and ont of the compartnents at the ends thereof, thus permitting the plows to cool after they have passed once through the hot ore in one conipartnent and before again entering the next following eonpartnent. It will also be seen that the Working parts of the f urnace--such as tracks, chains, and so on-are principally located outside of the compartnents, thus preventing wear and tearnvhieh Would be caused by heat if they Were located inside of the conipartnents. it Will further be seen that the secondary beams S are freely Suspended and are thus free to expand and eontract without injury to the arehes supported by the same. It Will also be seen that the falling of the ore or material from one eonpartment to another is to a considerable distance, so that any lunps or balls contained in the material are broken up on striking the hearth of the next following lower compartment. The falling of the ore through the heat moving in an opposite direction increases the rapidity of the desulfurizing process.

Having thus fully described ny inven tion, I claim as new and desire to secure hy Letters Patent-- 1. A calcining-furnaee, comprising a series of roasting-eonpartments located one above the other and connected in such a manner as to form a continuous chaniber for the passage of the ore and the heat, the latter traveling in an opposite direction to the movement of the ore, and a stirring and eonveying device eomprising an endless traveling chain having its several runs passin g longitudinally outside the said conpartnents, and plows or shovels earried by the said ehain and adapted to travel through the several conpartments to str up the material under treatment, and to move the same forward to pernit it to drop from a compartment into the next lower one at or near the ends thereof, substantially as shown and described.

2. A caleining-furnaee, comprising a series of roasting-compartments located one above the other, vertically-disposed ehannels connecting the compartnents with each other at opposite ends so as to form a continuous ehaniber for the passage of the material to be treated, a fire-box diseharging into one end of the lowernost eompartnent, a chinney connected with the end of the uppermost conipartment to eirculate heat from the said fireboX through the several eompartments, and a stirring and eonveying device comprising an endless traveling chain having its several runs passing longitudinally outside the said eonupartnents shafts carried by the said chain, and stirrers or shovels Secured on the said shafts and adapted to pass in and through the said conpartments,substantially as shown and described.

3. A calcining-furnace, conprsing a series of roasting-compartments located one above the other, vertically-disposed channels connecting` the conpartnents with each other at opposite ends so as to form a eontinuous chamber for the passage of the material to be treated, a fire-box discharging into one end of the lowernost compartnent, a chiinney connected with the end of the uppernost conpartnent to circulate heat from the said fireboX through the several compartments, a stirring and conveying device comprisingan endless traveling chain having its several runs passing longitudinally outside the said compartnents shafts carried by the said chain, and stirrers or shovels secured on the said shafts and adapted to pass in and through the said compartments, and doors on the ends and inside of the said compartnents, substantially as shown and described.

4. A calcining-furnaee comprising a series of roasting-conpartnents located one above the other, vertieally-disposed channels conneoting the eompartments With each other at IOO IIO

opposite ends so as to form a oontinuous ehamher for the passage of the material to be t'eated, a'fire-box dsoharging into one end of the lowermost eonpartnent, a ehmney connected with the end of the uppermost oonpartment to ereulate heat from the said firehox through the several compartnents, a stil'- -ng and oonveying devee eomprsing an endless t'avelng ehan having its several runs passing longitudnally outside the said eompartments, shafts earred by the said ehan, and stirrers or shovels Secured on the said shafts and adapted to pass in and through the said eompartments, longtudinal rals, and wheels held on the said sha'fts and adapted to travel on the said rals to properly support the said shafts, substantially as shown and described.

5.. A ealening-furnaee, Comprsing an outer Wall, an nner Wall, arches between the inner ARTHUR HARVEY XVETHEY.

XVitnesses:

WILLIAM H, HENRY, ROBERT G. BROWN. 

